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Who was the last head of state of the USSR, serving from 1988 until 1991, and the only Soviet leader....................

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The source of what river did Scottish physician and explorer Dr David Livingstone set out to find in 1866?

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A type of work produced in the 14th century in Europe and later, often called faience, is characterised by what?

Which infectious disease, usually occurring in childhood, is characterised by eruptions of successive crops of vesicles?

x-y=9 x*y=13 x² + y² = ( x - y )² + 2xy = 9² + 2(13) = 81 + 26 = 107

let the numbers be x and y we have x-y=9 and x*y=13

we know that (x-y)^2=x^2 + y^2 -2*x*y so, 81=x^2 + y^2 -2*13 x^2 + y^2= 81+26 x^2 + y^2 = 107 hence, sum of squares=107

let the numbers be x and y we have x-y=9 and x*y=13 we know that (x-y)^2=x^2 + y^2 -2*x*y so, 81=x^2 + y^2 -2*13 x^2 + y^2= 81+26 x^2 + y^2 = 107 hence, sum of squares=107

x-y=9 xy=13 (x-y)^2=x^2 +y^2-2xy 81=x^2+y^2-26 107=x^2+y^2

(x-y)^2 = x^2 - 2xy + y^2 = 81. x^2 + y ^2 = 81+ 2xy 2 xy = 2*13 = 26 So, the sum of their squares, x^2 + y^2 = 81+26 = 107.

The numbers be x, and x+9 X(X+9) = 13 X2 + 9x =13 --------------------------(1)

Sum of the squares = x2 + (x+9)2 = x 2+ x2 +18x + 81 = x2 + x2 + 9x + 9x + 81 = x2 + 9x + x2 + 9x + 81 Putting x2 + 9X = 13 ----------------------˃ Answer = 107